public PyTerExprIf(Expr left, Expr right) : base(" _pyif_ ", left, right)
{
PyTerExprElse = right as PyTerExprElse;
if (PyTerExprElse == null)
{
throw new ArgumentException($"Type of {nameof(right)} excepted to be {nameof(PyTerExprElse)} but is {right.GetType().FullName}");
}
}
public static Expr FormPyTerExpr(Expr left, Expr right)
{
if (!(right is PyTerExprElse pivot && pivot.Right is PyTerExprElse pivotChild))
{
return(new PyTerExprIf(left, right));
}
var c = new PyTerExprElse(pivot.Left, pivotChild.Left);
return(new PyTerExprElse(new PyTerExprIf(left, c), pivotChild.Right));
}